Effects of external NaCl on the growth of Atriplex amnicola and the ion relations and carbohydrate status of the leaves

Abstract

Atriplex amnieola, was grown in nutrient solution cultures with concentrations of NaCl up to 750 mol m"-\ The growth optimum was at 25-50 mol m"-^ NaCl and growth was 10-15% of that value at 750 mol m~^ NaCl. Sodium chloride at 200 mol m" ^ and higher reduced the rate of leaf extension and increased the time taken for a leaf to reach its maximal length.

Effect of salinity and K/Na ratio of irrigation water on growth and solute content of Atriplex amnicola and Sorghum bicolor

“…As is characteristic for the two types of plants represented, fresh and dry weights of the glycophyte, sorghum, decreased with each increment of added salinity, but were not affected in the extreme halophyte, Atriplex, until salinity exceeded 100 mM. For some reason or other, however, the Atriplex did not have significantly higher growth at 100 mM salinity than at the relatively nonsaline level of 4 mM, a response that is not in agreement with the results of Aslam et al (1986) for this same species. In both species, the growth reduction due to salinity was increased by increasing the K/Na ratio of the irrigation water, consistent with results obtained by others for these and similar species (Flowers et al 1977;Weimberg et al 1984).…”

Ion distribution in relation to leaf age inLeptochloa fusca(L.) Kunth* (Kallar grass) II. Anions*†

“…2, inset). The capacity of bladder hairs in Atriplex species is limited by their size (Thomson, 1975) and they accumulate salt mainly during the early stages of leaf development (Aslam et al, 1986). This is also reflected by the initially lower increase in chloride in the laminae of A. hortensis (Eig.…”

“…harley: Greenway, 1962;Jeschke & Wolf, 1985;Ricinus communis: Jeschke & Wolf, 1988, Suaeda: Gorham & Wyn Jones, 1983, Atriplex spp. : Jeschke & Stelter, 1983 ;Aslam et al, 1986) the distribution of anions amongst leaves in relation to leaf age and salinity has attracted less attention, except for chloride (Greenway, 1962). On the other hand, the distribution of anionic elements, N, P, and S, between leaves of increasing age has been widely studied.…”

Ion distribution in relation to leaf age inLeptochloa fusca*(L.) Kunth (Kallar grass)

“…high Na/low K in the oldest, and high K/low Na in the youngest leaf. Regarding this distribution of Na and K, Kallar grass resembled Hordeum vulgare (Greenway, 1962; Jeschke & Wolf, 1985), Suaeda (Gorham & Wyn Jones, 1983), species of Atriplex (Jeschke & Stelter, 1983;Aslam et al, 1986) as well as Ricinus communis (Jeschke & Wolf, 1988). This points to the importance of this type of distribution, since it was present in salt-sensitive glycophytes {Lupinus albus at low external salt: Jeschke, Atkins & Pate, 1985; Rye, Triticale and Aegilops: Gorham 1990a, fe); in salt-tolerant glycophytes {Hordeum, Ricinus); and in halophytes showing succulence {Suaeda), salt excretion by bladder hairs {Atriplex) or salt extrusion by glands {Leptochloa), and it emphasizes, to quote Jennings (1968), that 'halophytes and nonhalophytes differ in degree not kind'.…”

“…Hordeum vulgare, Greenway, 1962;Jeschke & Wolf, 1985; Ricinus communis, Jeschke & Wolf, 1988;Suaeda, Gorham & Wyn Jones, 1983; Atriplex spp., Jeschke & Stelter, 1983;Aslam et al, 1986). At the whole-plant level this reflected an efficient partitioning of K and Na between growing and mature tissues, which has been attributed to a preference of phloem translocation for K (Jeschke, 1984).…”